Physical Sciences and Mathematics Commons^™

Powerpoint - Acting On Urban Ecology, Center For Urban Resilience

Module 01: Introduction to Urban Ecology

No abstract provided.

Student Handout - Action In Urban Ecology, Center For Urban Resilience

Module 01: Introduction to Urban Ecology

No abstract provided.

Ecosystem Structure And Function_Answer Key, Center For Urban Resilience

Module 01: Introduction to Urban Ecology

No abstract provided.

Action In Urban Ecology - Action Plan Process, Center For Urban Resilience

Module 01: Introduction to Urban Ecology

No abstract provided.

Glacial Geology Of Readfield Maine, Bryer Carlson

Michael D. Wilson Symposium

This poster explores the glacial geology in the town of Readfield Maine. With the use of GPR (ground penetrating radar), LiDar imaging and the State's surficial geology maps, evidence for a specific glacial feature called an "esker" was sought out and collected.

Bedrock To Buildings, Bryer Carlson

Michael D. Wilson Symposium

This poster explores Maine's bedrock in relation to the state's infrastructure.

The Effect Of Changing Substrate On Arctic Aquatic Invertebrates Abundance, Tom Dolman

Michael D. Wilson Symposium

Climate change is directly affecting tundra ecosystems in northern regions, and warming temperatures have caused discontinuous permafrost and thawing sediments across the region. This project investigates how increasing erosion and the foraging patterns of migratory snow geese may degrade habitat for aquatic invertebrates in the upper Mast River, located in Wapusk National Park, Manitoba, Canada. In the past two decades, many of the important species of aquatic invertebrates have shown declines. Declining invertebrate populations are predicted to affect aquatic ecosystems and decrease the resources available to shorebirds and waterfowl, which breed and migrate through this area.

Suppressing Bias Stress Degradation In High Performance Solution Processed Organic Transistors Operating In Air, Hamna F. Iqbal, Qianxiang Ai, Karl J. Thorley, Hu Chen, Iain Mcculloch, Chad Risko, John E. Anthony, Oana D. Jurchescu

Chemistry Faculty Publications

Solution processed organic field effect transistors can become ubiquitous in flexible optoelectronics. While progress in material and device design has been astonishing, low environmental and operational stabilities remain longstanding problems obstructing their immediate deployment in real world applications. Here, we introduce a strategy to identify the most probable and severe degradation pathways in organic transistors and then implement a method to eliminate the main sources of instabilities. Real time monitoring of the energetic distribution and transformation of electronic trap states during device operation, in conjunction with simulations, revealed the nature of traps responsible for performance degradation. With this information, we …

Informing Drought Mitigation Policy By Estimating The Value Of Water For Crop Production, Renata Rimsaite, Justin Gibson, Nicholas Brozovic

School of Natural Resources: Faculty Publications

Farmers use irrigation to mitigate drought risk and reduce yield uncertainty. A clear understanding of the monetary value of irrigation water and how it varies across time and space can help to inform farmers and policymakers about the potential impacts of water shortages and reduce uncertainty in decision making. Here, we introduce a framework for understanding the economic value of water used to produce corn in the central High Plains region during the period 2010–2017. Our analysis uses publicly available data for corn price and for irrigated and non-irrigated yields and incorporates irrigation requirement adjustments to account for the hydrologic …

3rd Annual Hu Research Symposium Program 2021, Akeisha Belgrave, Rebekah Harriger, Erica Ward

2021 Annual HU Research Symposium

3rd Annual HU Research Symposium program and schedule of presenters. Presentations were held April 21st, 2021 virtually on the Teams platform.

Upper Cretaceous-Middle Eocene Aged Olistrostromal Pelagic Units In The Biga Peninsula (Nw Anatolia); Balıkkaya Formation, Serdar Akgündüz, İzver Özkar Öngen

Bulletin of the Mineral Research and Exploration

Balıkkaya formation consists of olistostromal units with a burgundy coloured mudstone, siltstone and pelagic limestone matrix containing various sizes of UpperJurassic-Lower Cretaceous limestone (Bilecik Limestone) blocks and Triassic Karakaya Complex blocks, which crop out in the west, south and southwest of Biga Town in Biga Peninsula (NW Anatolia). The matrix of Balıkkaya formation, of which age and sedimentary environment are controversial, contains Late Cretaceous (Maastrichtian) Abathomphalus mayaroensis (Bolli), Abathomphalus sp., Rosita fornicata (Plummer), Globotruncanidae, early Paleocene (Danian) Morozovella pseudobulloides (Plummer), late Paleocene (Thanetian) Morozovella velascoensis (Bolli), early Eocene Acarinina pentacamarata (Subbotina), middle Eocene Turborotalia frontosa (Subbotina), Turborotalia cerroazulensis (Cole), Orbulinoides …

A Divergent Strategy For The Synthesis Of Redox-Active Verdazyl Radical Polymers, Francois Magnan, Jasveer S. Dhindsa, Michael Anghel, Paul Bazylweski, Giovanni Fanchini, Joe Gilroy

Chemistry Publications

Stable radical polymers have attracted significant attention due to their use as magnetic materials, (co)catalysts in organic synthesis, and as functional components of organic electronics including batteries and memory devices. Despite their importance, a relatively narrow range of synthetic strategies exist for their production. The most common examples involve the transition-metal catalyzed polymerization of radical-containing monomers or the sequential polymerization of monomers containing radical precursors and their post-polymerization conversion to radicals. Post-polymerization installation of stable radicals is not commonly reported. Copper-assisted azide-alkyne cycloaddition (CuAAC) chemistry has seen limited use in this regard, but only for the production of p-conjugated and …

Co-Evolution Of Xylem Water And Soil Water Stable Isotopic Composition In A Northern Mixed Forest Biome, Jenna R. Snelgrove, James M. Buttle, Matthew J. Kohn, Dörthe Tetzlaff

Geosciences Faculty Publications and Presentations

Plant–soil water isotopic dynamics in northern forests have been understudied relative to other forest types; nevertheless, such information can provide insight into how such forests may respond to hydroclimatic change. This study examines the co-evolution of xylem water and soil water stable isotopic compositions in a northern mixed forest in Ontario, Canada. Gross precipitation, bulk soil water and xylem water were sampled from pre-leaf out to post-senescence in 2016 for eastern white cedar, eastern hemlock, red oak and eastern white pine. Near-bole soil water contents and mobile soil water isotopic compositions were measured for the last three species. Mobile soil …

Women, Globalization, Migration, And Work, Martha Donkor

Sustainability Research & Practice Seminar Presentations

Professor Martha Donkor, History and Women’s and Gender Studies - Women, Globalization, Migration, and Work

Using Information Theory To Extract Patterns From Categorical Raster Data, David Percy

Systems Science Faculty Publications and Presentations

Information theory -- Reconstructability Analysis (RA) implemented in the Occam software -- was used to extract patterns from National Land Cover Data. The aim was to predict temporal change in evergreen forests from time-lagged and spatially adjacent states. The NLCD satellite data were preprocessed with Python and submitted to Occam for analysis, and Occam output was also explored with R-studio. The effectiveness of RA methodology for the analysis of this type of categorical space-time grid data was demonstrated.

Robust Wavefront Dislocations Of Friedel Oscillations In Gapped Graphene, Shu-Hui Zhang, Jin Yang, Ding-Fu Shao, Zhenhua Wu, Wen Yang

Department of Physics and Astronomy: Faculty Publications

Friedel oscillation is a well-known wave phenomenon which represents the oscillatory response of electron waves to imperfection. By utilizing the pseudospin-momentum locking in gapless graphene, two recent experiments demonstrate the measurement of the topological Berry phase by corresponding to the unique number of wavefront dislocations in Friedel oscillations. Here, we study the Friedel oscillations in gapped graphene, in which the pseudospin-momentum locking is broken. Unusually, the wavefront dislocations do occur like that in gapless graphene, which requires immediate verification in the current experimental condition. The number of wavefront dislocations is ascribed to the invariant pseudospin winding number in gapped and …

The Interconnectivity Of Parkinson's Disease And Type Two Diabetes Mellitus, Erica Olfson

Honors Scholars Collaborative Projects

This thesis is about the biochemical connection between Parkinson's disease and Type II Diabetes Mellitus.

Analysis Of Winter Weather Conditions And Their Relationship To Crashes In Nebraska, John Cecava

Department of Earth and Atmospheric Sciences: Dissertations, Theses, and Student Research

Adverse weather conditions: such as changes in visibility, precipitation, wind speed, temperature, and road surface conditions, substantially impact highway and interstate safety. Therefore, an investigation into the winter weather conditions during highway and interstate crashes in Nebraska was conducted. Crash data were obtained from the Nebraska Department of Transportation (NDOT) for the years 2008 to 2018. In order to separate the non-winter weather related crashes and the winter weather related crashes, six filtrations were applied to make this possible. These filters were based on a few crash parameters: road classification, alcohol, and crash severity, and weather parameters within the crash …

The Use Of Mayflies, Stoneflies And Caddisflies As Indicators Of Fine Sediment Pollution In Salmon-Bearing Streams Of The Pacific Northwest, Cory Michael Mccaffrey

Dissertations and Theses

Fine sediment (particles < 2 mm in diameter) deposition is a natural component of streams but in excess amounts it is harmful to aquatic biota. Fine sediment is the main cause of impairment in streams and rivers of the Pacific Northwest and it can lead to unsuitable spawning and rearing habitat for Endangered Species Act (ESA) listed Salmon and steelhead. From a regulatory perspective, fine sediment presents a challenge because it is difficult to measure in situ and to establish criteria that would indicate stream impairment. Consequently, there is considerable effort to develop biocriteria using stream macroinvertebrates that would help regulators determine if a stream is impaired by excessive fine sediment.

Stream macroinvertebrates are widely used to monitor and assess stream degradation because they are affected by the physical, chemical and biological conditions in a stream. In particular, the stream insects known as mayflies (Ephemeroptera, E), stoneflies (Plecoptera, P) and caddisflies (Trichoptera, T) are commonly used as a metric referred to as EPT richness. EPT taxa are well known as pollutant intolerant …

The Agronomic Characteristics Of Agropyron Spp. Germplasm In Semi‐Steppe Region Of Iran, Mansour Mesdaghi, Masoume Amirkhani

IGC Proceedings (1993-2023)

No abstract provided.

Seed And Seedling Responses Of Genotype Of Bromus, Agropyron Fusarium Avenaceum And F. Graminearum In Laboratory And Natural Condition, Research Institute Of Forests And Rangelands, Iran

IGC Proceedings (1993-2023)

No abstract provided.

Study On Quality Of 22 Alfalfa Varieties In Hebei Lowland Plain, Yuan Li, Haiming Zhao, Nan Xie, Guibo Liu

IGC Proceedings (1993-2023)

No abstract provided.

Wildland Collection, Population Development, And Genetic Manipulation Of Native Rangeland Grasses In The Intermountain West Usa In Accordance With The Aosca Pre‐Variety Germplasm System, Thomas A. Jones

IGC Proceedings (1993-2023)

No abstract provided.

Dynamic Changes Of Tannin Contents In Five Varieties Of Tropical Leguminous Forages At Different Growth Stages And Their Responses To Fertilization, Y. B. Huang, Z. T. Chen, E. Chen, B. Q. Weng, J. G. Zheng

IGC Proceedings (1993-2023)

No abstract provided.

Cosmological Inflation In N-Dimensional Gaussian Random Fields With Algorithmic Data Compression, Connor Painter

Arts & Sciences Student Symposium

The leading theories of inflation are increasingly multi-dimensional. In this project, we consider a natural hypothesis that the inflaton potential, the theorized mechanism behind accelerated expansion in the early universe, is maximally random. We present a program that simulates random potentials, solves equations of motion, and catalogues predictions for observable quantities, such as perturbation spectra.

An Agent-Based Model To Evaluate The Effect Of Socioeconomic Status And Demographic Factors On Covid-19 Prevalence And Mortality, Jonathan Huang, Berke Nouri

Arts & Sciences Student Symposium

The purpose of the project is to discover how the prevalence and mortality of a pandemic change depending on a population’s demographic factors as well as various intervention policies through a NetLogo agent-based model. This model will simulate how demographic factors affect the course of COVID-19 (infection rate, recovery rate, and death rate). Demographic factors of interest will include population density, income distribution, age distribution, and number of hospital beds per capita. Intervention policies include vaccination, social distancing, mask wearing, mass testing, and quarantining. Conclusions about the effect of demographic factors on the infection, recovery, and death rate will be …

Analyzing Polychromatic Map-Making Techniques From Monochromatic Time-Ordered Data, Brianna Cantrall

Arts & Sciences Student Symposium

This research focuses on techniques for extracting polychromatic data from a monochromatic time-ordered data signal. Being able to reproduce polychromatic maps from monochromatic data broadens the way in which one can analyze properties of the universe. This polychromatic map reconstruction in this research focuses on being able to further analyze the Cosmic Microwave Background Radiation.

Domesticating Australian Native Legumes For Pastures: A Case Study In Cullen, Richard G. Bennett, M. H. Ryan, T. D. Colmer, Daniel Real

IGC Proceedings (1993-2023)

No abstract provided.

Biological And Economical Characteristics Of Galega Orientalis Lam, Zhongsheng Zhi, Wanquan Lian, Jianguang Wang, Weihua Gao, Yajun Zhi

IGC Proceedings (1993-2023)

No abstract provided.

Resource Of Dactylis Glomerata In The Transverse Mountainous Area In The Southwest China, Sheng Zhong, Shiming Xue, Bizhi Huang

IGC Proceedings (1993-2023)

No abstract provided.